Global Patent Index - EP 1847383 A1

EP 1847383 A1 2007-10-24 - Acoustic composite and twin-shell lightweight trim part comprising such a composite

Title (en)

Acoustic composite and twin-shell lightweight trim part comprising such a composite

Title (de)

Akustischer Verbundkörper und Leichtverkleidungselement mit einer Zweitschale, das einen derartigen Verbundkörper enthält

Title (fr)

Matériau composite acoustique et élément de garnissage léger comprenant un tel matériau

Publication

EP 1847383 A1 (EN)

Application

EP 06008354 A

Priority

EP 06008354 A

Abstract (en)

A twin-shell lightweight acoustic trim part (11), in particular a self-supporting vehicle's headliner or a rear parcel shelf comprises a thermoplastic acoustically effective structural composite (5). This composite comprises at least three layers (2, 3, 4), in particular on its front side a skin layer (4), preferably a binder layer made of a thermoplastic non-woven or grid, a stiffening layer (3) made of a non-woven comprising polypropylene and glass fibres, and on its rear side a soft layer (2) consisting of a polyolefin foam. These layers are needle-punched together in order to set a desired airflow resistance R in the range of 200 Nsm -3 to 5000 Nsm -3 . In a preferred embodiment, the twin-shell lightweight acoustic trim part (11) comprises a core layer (8) which contains 50 parts of elastomeric foam sticks, 20 parts of glass fibres, 10 parts of polypropylene fibres material, and 20 parts bicomponent polyester fibres and preferably comprises additional 15% of recycled elastic foam material. This trim part is designed such that the thermoplastic bonded and acoustically effective structural composite (5) allows to absorb the uneven pressure forces of the elastomeric foam material (9) of the core layer (8) in order to achieve a smooth and soft touch feeling.

IPC 8 full level (invention and additional information)

B32B 7/08 (2006.01); B32B 5/26 (2006.01); B60R 13/08 (2006.01)

CPC (invention and additional information)

B32B 7/08 (2013.01); B32B 5/022 (2013.01); B32B 5/08 (2013.01); B32B 5/18 (2013.01); B32B 5/245 (2013.01); B32B 5/26 (2013.01); B60R 13/08 (2013.01); B32B 2262/0253 (2013.01); B32B 2262/0276 (2013.01); B32B 2262/101 (2013.01); B32B 2262/12 (2013.01); B32B 2262/14 (2013.01); B32B 2266/0207 (2013.01); B32B 2266/025 (2013.01); B32B 2266/0292 (2013.01); B32B 2266/08 (2013.01); B32B 2307/102 (2013.01); B32B 2307/51 (2013.01); B32B 2307/718 (2013.01); B32B 2605/003 (2013.01); Y10T 428/249953 (2015.04); Y10T 428/249981 (2015.04); Y10T 442/652 (2015.04)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK YU

EPO simple patent family

EP 1847383 A1 20071024; EP 2010378 A2 20090107; JP 2009534241 A 20090924; US 2009298374 A1 20091203; WO 2007121964 A2 20071101; WO 2007121964 A3 20080904

INPADOC legal status


2008-04-30 [18W] WITHDRAWN

- Effective date: 20080221

2007-10-24 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

2007-10-24 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: AL BA HR MK YU